Steam-exhaust nozzle for locomotives.



P. T. HAYWARD & w. P. SANDERSON.

STEAM EXHAUST NOZZLE FOR LOCOMOTIVES.

APPLICATION FILED MAY I0. I9I5.

Patented Apr. 25, 1916.

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TTN UTT Tt/EO PETER TH-OIMAS HAYWARD AND WILLIAM PATRICK SANDER/SON, (3F GOLLIE, WESTERN AUSTRALIA, AUSTRALIA.

STEAM-EXHAUST NOZZLE FOR LUCOlVIO'IIVES.

Application filed May 10, 1915.

To all whom it may concern Be it known that we, Pnrnn Tnoims ITAY- WARD and 11mm; PATRICK. Snxnnnsox, both subjects of the King of Great Britain, residing at Collie, Western Australia, Commonwealth of Australia have invented certain new and useful Improvements in Steam- Exhaust Nozzles for Locomotives, of which the following is a specification.

This nozzle appliance in connection with the steam exhaust pipes of locomotives is designed to provide means whereby an effective draft is maintained in the furnace during all variations in the work done by the engine.

This nozzle provides an auxiliary outlet for the steam when the engine is expending its maximum exhaust of steam.

The nozzle in its nature and use acts as an automatic and variable agent for the exit of the steam and its essential feature resides in the employment of a vertically vibrating or pulsating ring herein termed floating ring and which is operatively held within a circular taper casing said casing being open top and bottom and this casing is placed immediately over the mouth of the steam pipe.

In order that the construction of our invention may be clearly understood reference will be made to the annexed drawings wherein Figure 1 is a sectional elevation of the nozzle and in this figure the exhaust pipe v is shown in broken lines. Fig. 2 is a broken away detail section view show ing the curved rim or leaf of the floating ring. Fig. 3 is a top plan of the appliance.

Referring to said drawings a is the outer hollow casing held on the exhaust pipe 50 by the bolts and nuts (L This casing a is preferably of a taper form as shown and in Said casing is suspended or operatively held the floating ring 6 by means of the vertical guides c and on said guides the ring 7) moves up and down by the action of the steam blasts. These guides at their top are interscrewed into the head cl of the casing and locked by the nuts 6. The guides at their lower ends are held in the brackets f by suitable pins. Said brackets are suit ably secured to the inside of the casing a. On these guides c we employ lower spiral or helical springs g which act as seats for the Specification of Letters Patent.

Patented Apr. 25, 1916.

Serial No. 27,200.

ring Z) and their duty is to urge the ring to its up or closed position that is to give a minimum exit area of the bypass 3 for the exhaust steam. These springs g operate between the shoulder j of the ring and the tension adjustment nuts r 1? as shown. The nozzle is also provided with the upper spring m which operate between the shoulder a of the ring and the underside of the head (Z of the casing. The duty of said upper spring is to urge the ring to its down or open position so allowing of a maximum exit area of the annular bypass y, and these springs g and m provide a suspensory or compensating cushion for the movements of the ring 6. The annular bypass g which exists between the top edge of the ring and the head (Z of the casing communicates with the central or main exit of the casing. The upper springs m have greater resilient strength than the lower springs g and said springs act in opposition relatively to the floating ring and whereby an annular by pass capable of being closed and opened by the rise and fall of the ring and in working conjunction with the exhaust steam issuing from the exhaust pipe of an engine is pro vided.

The floating ring is made with an upwardly directed and curved leaf or rim 3) which guides the steam effectively to the annular bypass y. The major portion of the exhaust steam makes exit through the central passage of the ring.

The operation of the nozzle is as follows Assume that the casing a is full of exhaust steam from the pipe 00 and the floating ring Z) in the down or open position as seen in Fig. l that is sitting on the spring 9 therefore the annular by-pass 3 is fully open and allows certain portion of the steam to pass therethrough and rejoin the main steam current while the major portion of the steam makes exit through the interior of the ring and casing and thence into the engine funnel in the usual manner. The ring 6 maintains such open position until an excess of steam by any cause accumulates in the casing a and to such a degree as to develop suflicient pressure capable for lifting the ring In whereupon said ring rises and closes the annular bypass 3 thus compelling all of the steam to pass up centrally up through the ring and casing. As soon as relief is effected that is when steam pres sure falls in the casing to such a degree as to be incapable of retaining the ring in the raised or closed position the ring consequently falls and becomes open thus allowing portion of the steam to escape through said annular bypass yr The springs m as beforesaid urge and assist the downward movement of the ring. The ring rises and falls as in a floating manner and in obedience with the force of the steam exhaust and therefore has a pulsating or throbbing movement owing to the intermittent beats or blows of the exhaust steam and said ring rides on or is suspended on the steam body and is guided in its movements by the guides c as above mentioned.

lVhat we claim as our invention and desire to secure by Letters Patent is In a device of the class specified, a nozzle having an outlet opening, a ring mounted within the nozzle to sensitively float and having an upwardly directed leaf or rim,

guides heldwithin the nozzle and slidably engaged by portions of the ring adjacent to the rim of the latter, the annular edge of the ring and the wall of the outlet of the nozzle being arranged to form a bypass between them, pairs of springs mounted on the guides and respectively engaging upper and lower portions of the ring adjacent to the rim of the latter, the said springs acting in opposition and the upper springs being of greater resilient strength than the lower springs whereby an annular bypass capable of being closed and opened by the rise and fall of the ring and in working conjunction with the exhaust steam issuing from the exhaust pipe of an engine is provided.

In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

PETER THOMAS HAYWARD. WILLIAM PATRICK SANDERSON.

Witnesses: v

CHAS. E. SPENCER, ALBERT RICHARDS.

Copies of this patent may be obtained for five cents each, by addressing the "commissioner of Iatents,

' Washington, D. G. 

